import { mutation, query } from "./_generated/server";
import { v } from "convex/values";
import { getAuthUserId } from "@convex-dev/auth/server";

const opportunityInput = v.object({
  url: v.string(),
  platform: v.string(),
  title: v.string(),
  snippet: v.string(),
  relevanceScore: v.number(),
  intent: v.string(),
  suggestedApproach: v.string(),
  matchedKeywords: v.array(v.string()),
  matchedProblems: v.array(v.string()),
  softPitch: v.boolean(),
});

export const listByProject = query({
  args: {
    projectId: v.id("projects"),
    status: v.optional(v.string()),
    intent: v.optional(v.string()),
    searchJobId: v.optional(v.id("searchJobs")),
    minScore: v.optional(v.number()),
    limit: v.optional(v.number()),
  },
  handler: async (ctx, args) => {
    const userId = await getAuthUserId(ctx);
    if (!userId) return [];

    const project = await ctx.db.get(args.projectId);
    if (!project || project.userId !== userId) return [];

    const limit = args.limit ?? 50;
    let queryBuilder = args.searchJobId
      ? ctx.db
          .query("opportunities")
          .withIndex("by_project_searchJob", (q) =>
            q.eq("projectId", args.projectId).eq("searchJobId", args.searchJobId!)
          )
      : args.status
        ? ctx.db
            .query("opportunities")
            .withIndex("by_project_status", (q) =>
              q.eq("projectId", args.projectId).eq("status", args.status!)
            )
        : ctx.db
            .query("opportunities")
            .withIndex("by_project_createdAt", (q) =>
              q.eq("projectId", args.projectId)
            );

    if (args.intent) {
      queryBuilder = queryBuilder.filter((q) =>
        q.eq(q.field("intent"), args.intent)
      );
    }

    if (args.minScore !== undefined) {
      queryBuilder = queryBuilder.filter((q) =>
        q.gte(q.field("relevanceScore"), args.minScore)
      );
    }

    const results = await queryBuilder.order("desc").collect();
    return results.slice(0, limit);
  },
});

export const upsertBatch = mutation({
  args: {
    projectId: v.id("projects"),
    analysisId: v.optional(v.id("analyses")),
    searchJobId: v.optional(v.id("searchJobs")),
    opportunities: v.array(opportunityInput),
  },
  handler: async (ctx, args) => {
    const userId = await getAuthUserId(ctx);
    if (!userId) throw new Error("Unauthorized");

    const project = await ctx.db.get(args.projectId);
    if (!project || project.userId !== userId) {
      throw new Error("Project not found or unauthorized");
    }

    let created = 0;
    let updated = 0;
    const now = Date.now();

    for (const opp of args.opportunities) {
      const existing = await ctx.db
        .query("opportunities")
        .withIndex("by_project_url", (q) =>
          q.eq("projectId", args.projectId).eq("url", opp.url)
        )
        .first();

      if (existing) {
        await ctx.db.patch(existing._id, {
          analysisId: args.analysisId,
          searchJobId: args.searchJobId,
          platform: opp.platform,
          title: opp.title,
          snippet: opp.snippet,
          relevanceScore: opp.relevanceScore,
          intent: opp.intent,
          suggestedApproach: opp.suggestedApproach,
          matchedKeywords: opp.matchedKeywords,
          matchedProblems: opp.matchedProblems,
          softPitch: opp.softPitch,
          updatedAt: now,
        });
        updated += 1;
      } else {
        await ctx.db.insert("opportunities", {
          projectId: args.projectId,
          analysisId: args.analysisId,
          searchJobId: args.searchJobId,
          url: opp.url,
          platform: opp.platform,
          title: opp.title,
          snippet: opp.snippet,
          relevanceScore: opp.relevanceScore,
          intent: opp.intent,
          status: "new",
          suggestedApproach: opp.suggestedApproach,
          matchedKeywords: opp.matchedKeywords,
          matchedProblems: opp.matchedProblems,
          softPitch: opp.softPitch,
          createdAt: now,
          updatedAt: now,
        });
        created += 1;
      }

      const seenExisting = await ctx.db
        .query("seenUrls")
        .withIndex("by_project_url", (q) =>
          q.eq("projectId", args.projectId).eq("url", opp.url)
        )
        .first();

      if (seenExisting) {
        await ctx.db.patch(seenExisting._id, {
          lastSeenAt: now,
          source: "opportunities",
        });
      } else {
        await ctx.db.insert("seenUrls", {
          projectId: args.projectId,
          url: opp.url,
          firstSeenAt: now,
          lastSeenAt: now,
          source: "opportunities",
        });
      }
    }

    return { created, updated };
  },
});

export const updateStatus = mutation({
  args: {
    id: v.id("opportunities"),
    status: v.string(),
    notes: v.optional(v.string()),
    tags: v.optional(v.array(v.string())),
  },
  handler: async (ctx, args) => {
    const userId = await getAuthUserId(ctx);
    if (!userId) throw new Error("Unauthorized");

    const opportunity = await ctx.db.get(args.id);
    if (!opportunity) throw new Error("Opportunity not found");

    const project = await ctx.db.get(opportunity.projectId);
    if (!project || project.userId !== userId) {
      throw new Error("Project not found or unauthorized");
    }

    const now = Date.now();
    const patch: Record<string, unknown> = {
      status: args.status,
      notes: args.notes,
      tags: args.tags,
      updatedAt: now,
    };
    if (args.status === "sent") patch.sentAt = now;
    if (args.status === "archived") patch.archivedAt = now;
    await ctx.db.patch(args.id, patch);
  },
});

export const countByDay = query({
  args: {
    projectId: v.id("projects"),
    days: v.optional(v.number()),
    metric: v.union(
      v.literal("created"),
      v.literal("sent"),
      v.literal("archived")
    ),
  },
  handler: async (ctx, args) => {
    const userId = await getAuthUserId(ctx);
    if (!userId) return [];

    const project = await ctx.db.get(args.projectId);
    if (!project || project.userId !== userId) return [];

    const days = args.days ?? 14;
    const now = Date.now();
    const start = now - days * 24 * 60 * 60 * 1000;

    const results = await ctx.db
      .query("opportunities")
      .withIndex("by_project_createdAt", (q) => q.eq("projectId", args.projectId))
      .order("desc")
      .collect();

    const counts = new Map<string, number>();
    const toDateKey = (timestamp: number) =>
      new Date(timestamp).toISOString().slice(0, 10);

    for (const opp of results) {
      let timestamp: number | null = null;
      if (args.metric === "created") {
        timestamp = opp.createdAt;
      } else if (args.metric === "sent") {
        timestamp =
          opp.sentAt ??
          (opp.status === "sent" || opp.status === "converted"
            ? opp.updatedAt
            : null);
      } else if (args.metric === "archived") {
        timestamp =
          opp.archivedAt ??
          (opp.status === "archived" || opp.status === "ignored"
            ? opp.updatedAt
            : null);
      }

      if (!timestamp || timestamp < start) continue;
      const key = toDateKey(timestamp);
      counts.set(key, (counts.get(key) ?? 0) + 1);
    }

    const series = [];
    for (let i = days - 1; i >= 0; i -= 1) {
      const date = new Date(now - i * 24 * 60 * 60 * 1000)
        .toISOString()
        .slice(0, 10);
      series.push({ date, count: counts.get(date) ?? 0 });
    }

    return series;
  },
});