"use client";

import { useState, useEffect, useCallback } from "react";
import Card from "@/components/ui/Card";

const today = () => new Date().toISOString().split("T")[0];

interface MarketUpdate {
  btc: string;
  eth: string;
  sol: string;
  btcChange: string;
  ethChange: string;
  solChange: string;
}

interface CompletedTask {
  task: string;
  completed: boolean;
}

interface ProjectProgress {
  project: string;
  progress: number;
}

interface CouncilFeedback {
  horus: string;
  amun: string;
  [key: string]: string;
}

interface FormState {
  date: string;
  marketUpdate: MarketUpdate;
  completedTasks: CompletedTask[];
  tomorrowPriorities: string[];
  councilFeedback: CouncilFeedback;
  projectProgress: ProjectProgress[];
}

const defaultProjects = ["SiteMente", "HolaCompi", "WandVoice"];

const defaultForm: FormState = {
  date: today(),
  marketUpdate: { btc: "", eth: "", sol: "", btcChange: "", ethChange: "", solChange: "" },
  completedTasks: [{ task: "", completed: true }],
  tomorrowPriorities: ["", "", "", "", ""],
  councilFeedback: { horus: "", amun: "" },
  projectProgress: defaultProjects.map((p) => ({ project: p, progress: 0 })),
};

export default function EodBriefPage() {
  const [form, setForm] = useState<FormState>(defaultForm);
  const [saving, setSaving] = useState(false);
  const [saved, setSaved] = useState(false);
  const [errors, setErrors] = useState<Record<string, string>>({});
  const [loadingDate, setLoadingDate] = useState(false);
  const [extraAgents, setExtraAgents] = useState<string[]>([]);

  const loadBriefForDate = useCallback(async (date: string) => {
    setLoadingDate(true);
    try {
      const res = await fetch(`/api/eod?date=${date}`);
      const data = await res.json();
      if (data) {
        const mu = typeof data.marketUpdate === "string" ? JSON.parse(data.marketUpdate) : (data.marketUpdate || defaultForm.marketUpdate);
        const ct = typeof data.completedTasks === "string" ? JSON.parse(data.completedTasks) : (data.completedTasks || defaultForm.completedTasks);
        const tp = typeof data.tomorrowPriorities === "string" ? JSON.parse(data.tomorrowPriorities) : (data.tomorrowPriorities || defaultForm.tomorrowPriorities);
        const cf = typeof data.councilFeedback === "string" ? JSON.parse(data.councilFeedback) : (data.councilFeedback || defaultForm.councilFeedback);
        const pp = typeof data.projectProgress === "string" ? JSON.parse(data.projectProgress) : (data.projectProgress || defaultForm.projectProgress);

        setForm({ date: data.date, marketUpdate: mu, completedTasks: ct, tomorrowPriorities: tp, councilFeedback: cf, projectProgress: pp });

        // Detect extra agents
        const extras = Object.keys(cf).filter((k) => k !== "horus" && k !== "amun");
        setExtraAgents(extras);
      } else {
        setForm({ ...defaultForm, date });
        setExtraAgents([]);
      }
    } catch {
      setForm({ ...defaultForm, date });
    } finally {
      setLoadingDate(false);
    }
  }, []);

  useEffect(() => {
    loadBriefForDate(today());
  }, [loadBriefForDate]);

  const validate = (): boolean => {
    const errs: Record<string, string> = {};
    if (!form.completedTasks.some((t) => t.task.trim())) errs.completedTasks = "At least one completed task is required";
    if (!form.tomorrowPriorities.some((p) => p.trim())) errs.tomorrowPriorities = "At least one priority for tomorrow is required";
    setErrors(errs);
    return Object.keys(errs).length === 0;
  };

  const handleSave = async () => {
    if (!validate()) return;
    setSaving(true);
    try {
      const res = await fetch("/api/eod", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(form),
      });
      if (!res.ok) {
        const err = await res.json();
        setErrors({ submit: err.error || "Failed to save" });
      } else {
        setSaved(true);
        setTimeout(() => setSaved(false), 3000);
      }
    } catch {
      setErrors({ submit: "Network error. Please try again." });
    } finally {
      setSaving(false);
    }
  };

  const updateTask = (index: number, field: keyof CompletedTask, value: string | boolean) => {
    setForm((prev) => {
      const tasks = [...prev.completedTasks];
      tasks[index] = { ...tasks[index], [field]: value };
      return { ...prev, completedTasks: tasks };
    });
  };

  const addTask = () => {
    setForm((prev) => ({ ...prev, completedTasks: [...prev.completedTasks, { task: "", completed: true }] }));
  };

  const removeTask = (index: number) => {
    setForm((prev) => ({ ...prev, completedTasks: prev.completedTasks.filter((_, i) => i !== index) }));
  };

  const updatePriority = (index: number, value: string) => {
    setForm((prev) => {
      const arr = [...prev.tomorrowPriorities];
      arr[index] = value;
      return { ...prev, tomorrowPriorities: arr };
    });
  };

  const addPriority = () => {
    setForm((prev) => ({ ...prev, tomorrowPriorities: [...prev.tomorrowPriorities, ""] }));
  };

  const removePriority = (index: number) => {
    setForm((prev) => ({ ...prev, tomorrowPriorities: prev.tomorrowPriorities.filter((_, i) => i !== index) }));
  };

  const updateProgress = (index: number, value: number) => {
    setForm((prev) => {
      const pp = [...prev.projectProgress];
      pp[index] = { ...pp[index], progress: value };
      return { ...prev, projectProgress: pp };
    });
  };

  const addProject = () => {
    setForm((prev) => ({ ...prev, projectProgress: [...prev.projectProgress, { project: "", progress: 0 }] }));
  };

  const updateProjectName = (index: number, name: string) => {
    setForm((prev) => {
      const pp = [...prev.projectProgress];
      pp[index] = { ...pp[index], project: name };
      return { ...prev, projectProgress: pp };
    });
  };

  const updateCouncil = (agent: string, value: string) => {
    setForm((prev) => ({ ...prev, councilFeedback: { ...prev.councilFeedback, [agent]: value } }));
  };

  const addAgent = () => {
    const name = prompt("Agent name:");
    if (name?.trim()) {
      setExtraAgents((prev) => [...prev, name.trim()]);
      setForm((prev) => ({ ...prev, councilFeedback: { ...prev.councilFeedback, [name.trim()]: "" } }));
    }
  };

  const changeColor = (val: string) => {
    const n = parseFloat(val);
    if (isNaN(n)) return "text-slate-400";
    return n >= 0 ? "text-emerald-400" : "text-red-400";
  };

  const progressColor = (p: number) => {
    if (p >= 80) return "bg-emerald-500";
    if (p >= 50) return "bg-amber-500";
    if (p >= 25) return "bg-orange-500";
    return "bg-red-500";
  };

  return (
    <div className="p-6 max-w-4xl mx-auto">
      {/* Header */}
      <div className="flex items-center justify-between mb-6">
        <div>
          <h1 className="text-xl font-bold text-white flex items-center gap-2">
            <span className="text-blue-400">🌙</span> End-of-Day Brief
          </h1>
          <p className="text-sm text-slate-500 mt-0.5">Horus + Amun daily debrief</p>
        </div>
        <div className="flex items-center gap-3">
          <input
            type="date"
            value={form.date}
            onChange={(e) => {
              setForm((prev) => ({ ...prev, date: e.target.value }));
              loadBriefForDate(e.target.value);
            }}
            className="bg-[#1a1d27] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm text-slate-300 focus:outline-none focus:border-blue-500/50"
          />
          <button
            onClick={handleSave}
            disabled={saving || loadingDate}
            className="px-4 py-2 bg-blue-600 hover:bg-blue-500 disabled:opacity-50 text-white font-semibold text-sm rounded-lg transition-colors"
          >
            {saving ? "Saving…" : saved ? "✓ Saved" : "Save Brief"}
          </button>
        </div>
      </div>

      {errors.submit && (
        <div className="mb-4 p-3 bg-red-500/10 border border-red-500/30 rounded-lg text-red-400 text-sm">
          {errors.submit}
        </div>
      )}

      {loadingDate && (
        <div className="mb-4 p-3 bg-blue-500/10 border border-blue-500/30 rounded-lg text-blue-400 text-sm">
          Loading brief for selected date…
        </div>
      )}

      <div className="space-y-5">
        {/* Market Update */}
        <Card title="📈 Market Update" accent="blue">
          <div className="grid grid-cols-3 gap-4">
            {(["btc", "eth", "sol"] as const).map((coin) => (
              <div key={coin}>
                <label className="block text-xs text-slate-500 mb-1.5 uppercase font-mono">{coin}</label>
                <input
                  type="text"
                  value={form.marketUpdate[coin]}
                  onChange={(e) =>
                    setForm((p) => ({ ...p, marketUpdate: { ...p.marketUpdate, [coin]: e.target.value } }))
                  }
                  placeholder="$0.00"
                  className="w-full bg-[#0f1117] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm text-slate-200 focus:outline-none focus:border-blue-500/50 mb-2"
                />
                <input
                  type="text"
                  value={form.marketUpdate[`${coin}Change` as keyof MarketUpdate]}
                  onChange={(e) =>
                    setForm((p) => ({
                      ...p,
                      marketUpdate: { ...p.marketUpdate, [`${coin}Change`]: e.target.value },
                    }))
                  }
                  placeholder="24h % (e.g. +2.5)"
                  className={`w-full bg-[#0f1117] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-blue-500/50 ${changeColor(form.marketUpdate[`${coin}Change` as keyof MarketUpdate])}`}
                />
              </div>
            ))}
          </div>
        </Card>

        {/* Completed Tasks */}
        <Card title="✅ Completed Tasks" accent="green">
          {errors.completedTasks && (
            <p className="text-xs text-red-400 mb-2">{errors.completedTasks}</p>
          )}
          <div className="space-y-2">
            {form.completedTasks.map((task, i) => (
              <div key={i} className="flex items-center gap-2">
                <button
                  onClick={() => updateTask(i, "completed", !task.completed)}
                  className={`w-5 h-5 rounded border flex-shrink-0 flex items-center justify-center transition-colors ${
                    task.completed
                      ? "bg-emerald-500 border-emerald-500 text-white"
                      : "border-[#2a2d3a] bg-transparent"
                  }`}
                >
                  {task.completed && (
                    <svg width="10" height="10" viewBox="0 0 12 12" fill="none">
                      <path d="M2 6l3 3 5-5" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" />
                    </svg>
                  )}
                </button>
                <input
                  type="text"
                  value={task.task}
                  onChange={(e) => updateTask(i, "task", e.target.value)}
                  placeholder={`Task ${i + 1}`}
                  className={`flex-1 bg-[#0f1117] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-emerald-500/50 ${
                    task.completed ? "text-slate-400 line-through" : "text-slate-200"
                  }`}
                />
                {form.completedTasks.length > 1 && (
                  <button
                    onClick={() => removeTask(i)}
                    className="text-slate-600 hover:text-red-400 transition-colors text-lg leading-none"
                  >
                    ×
                  </button>
                )}
              </div>
            ))}
            <button
              onClick={addTask}
              className="text-xs text-emerald-400 hover:text-emerald-300 transition-colors mt-1"
            >
              + Add task
            </button>
          </div>
        </Card>

        {/* Tomorrow's Priorities */}
        <Card title="⚡ Priorities for Tomorrow" accent="amber">
          {errors.tomorrowPriorities && (
            <p className="text-xs text-red-400 mb-2">{errors.tomorrowPriorities}</p>
          )}
          <div className="space-y-2">
            {form.tomorrowPriorities.map((p, i) => (
              <div key={i} className="flex gap-2">
                <span className="text-xs text-amber-500/70 font-mono mt-2.5 w-5">{i + 1}.</span>
                <input
                  type="text"
                  value={p}
                  onChange={(e) => updatePriority(i, e.target.value)}
                  placeholder={`Priority ${i + 1}`}
                  className="flex-1 bg-[#0f1117] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm text-slate-200 focus:outline-none focus:border-amber-500/50"
                />
                {form.tomorrowPriorities.length > 3 && (
                  <button
                    onClick={() => removePriority(i)}
                    className="text-slate-600 hover:text-red-400 transition-colors text-lg leading-none mt-1"
                  >
                    ×
                  </button>
                )}
              </div>
            ))}
            {form.tomorrowPriorities.length < 7 && (
              <button
                onClick={addPriority}
                className="text-xs text-amber-400 hover:text-amber-300 transition-colors mt-1"
              >
                + Add priority
              </button>
            )}
          </div>
        </Card>

        {/* Council Feedback */}
        <Card title="🏛 Council Feedback" subtitle="One sentence per agent" accent="purple">
          <div className="space-y-3">
            {(["horus", "amun", ...extraAgents] as string[]).map((agent) => (
              <div key={agent}>
                <label className="block text-xs text-slate-500 mb-1.5 capitalize font-medium">
                  {agent === "horus" ? "🦅 Horus" : agent === "amun" ? "⚙️ Amun" : `🤖 ${agent}`}
                </label>
                <input
                  type="text"
                  value={form.councilFeedback[agent] || ""}
                  onChange={(e) => updateCouncil(agent, e.target.value)}
                  placeholder={`${agent.charAt(0).toUpperCase() + agent.slice(1)}'s one-sentence feedback`}
                  className="w-full bg-[#0f1117] border border-[#2a2d3a] rounded-lg px-3 py-2 text-sm text-slate-200 focus:outline-none focus:border-purple-500/50"
                />
              </div>
            ))}
            <button
              onClick={addAgent}
              className="text-xs text-purple-400 hover:text-purple-300 transition-colors mt-1"
            >
              + Add agent
            </button>
          </div>
        </Card>

        {/* Project Progress */}
        <Card title="📊 Project Progress" accent="blue">
          <div className="space-y-4">
            {form.projectProgress.map((proj, i) => (
              <div key={i}>
                <div className="flex items-center justify-between mb-1.5">
                  <input
                    type="text"
                    value={proj.project}
                    onChange={(e) => updateProjectName(i, e.target.value)}
                    placeholder="Project name"
                    className="bg-transparent text-sm font-medium text-slate-300 focus:outline-none border-b border-transparent focus:border-blue-500/50 pb-0.5 w-40"
                  />
                  <div className="flex items-center gap-2">
                    <span className="text-xs text-slate-500 font-mono">{proj.progress}%</span>
                    <input
                      type="number"
                      min="0"
                      max="100"
                      value={proj.progress}
                      onChange={(e) => updateProgress(i, Math.min(100, Math.max(0, parseInt(e.target.value) || 0)))}
                      className="w-16 bg-[#0f1117] border border-[#2a2d3a] rounded px-2 py-1 text-xs text-slate-300 focus:outline-none focus:border-blue-500/50 text-center"
                    />
                  </div>
                </div>
                <div className="h-2 bg-[#0f1117] rounded-full overflow-hidden border border-[#2a2d3a]">
                  <div
                    className={`h-full rounded-full transition-all duration-300 ${progressColor(proj.progress)}`}
                    style={{ width: `${proj.progress}%` }}
                  />
                </div>
              </div>
            ))}
            <button
              onClick={addProject}
              className="text-xs text-blue-400 hover:text-blue-300 transition-colors mt-1"
            >
              + Add project
            </button>
          </div>
        </Card>

        {/* Save Button */}
        <div className="flex justify-end pb-6">
          <button
            onClick={handleSave}
            disabled={saving}
            className="px-6 py-2.5 bg-blue-600 hover:bg-blue-500 disabled:opacity-50 text-white font-semibold text-sm rounded-lg transition-colors"
          >
            {saving ? "Saving…" : saved ? "✓ Brief Saved!" : "Save EOD Brief"}
          </button>
        </div>
      </div>
    </div>
  );
}